Sheet glass apparatus



June 23, 1931 1.. MAMBOURG SHEET GLASS APPARATUS 1926 v 2 sheets sheet 2 Filed June 21 gwuentoz Leopo/o Mambourg I sheet pf glass.

Patented June 23, 1931 UNITED STATES PATENT OFFICE 4 Lnoronn HAMBOUBG, or nurcns'rnn, omo, nssrenon "r0 LIBBEY-OWENS-FORD Grinss comm, or 'roLEDo, OHIO, A conronn'rron or onro smear amiss n'rrnnnrus Application am June 21,

An important object of the invention is to provide a sheet glass apparatus, and includes means whereby two films of glass are united to form .a'sin 1e sheet. Another ob]ect of the invention is to provide a process and apparatus for producing 'sheet glass wherein two streams of glass are drawn over suitable surfaces, after which they are united to produce a sheet of substantially predetermined thickness.

Another object of the invention is to provide a process and apparatus for producing 16 sheet glass wherein a slab is arranged over a mass of molten glass in a manner that suitable films or streams of glass maybe dragged over two surfaces of said slab, after which the two streams are united to form a single Still another object of the invention is to provide an apparatus of this nature wherein a slab is arranged over a mass of molten glass, and including means whereby a double bait arrangement may be dipped into said mass of molten glass and moved therefrom in a manner that two streams of glass will be j pulled up over a slab and united at the top of said slab to form a single sheet. v Qther objects and advantages of the invention will become apparent during the course of the following description. 7

In the drawings wherein like numerals are employed to designate like parts throughout thesame, Fig. 1 is a vertical longitudinal section through a glass forming apparatus illustrat:

ingrone form of my invention in use,

ig. 2 is a transverse section through the apparatus,

Fig; 3 is a fra entary sectionalview showing t e type of ait used,

ig. 4 1s a fragmentary-perspective v ew of 51. slightly modified form of the invention, a v

Figs. 5, 6 and 7 show modified forms of slabs. 1

' In the drawings the numerallO designates a tank furnace having connection with a suitable receptacle 11 which is known in the art 1926. Serial N0. 117,802.

11 is preferably supported upon suitable stools 13 in a compartment ada ted for heating the bottom and end wallo said pot.'.

Mounted over the mass of molten glass 12 are'lip tiles 14 and 15 and lip tile coolers 16, arranged in spaced relation, leaving an exposed area on the surface of the molten glass 12 from which a sheet of glass may be produced.

Arranged referably transversely of the pot 11 is a sla 17, which, as shown in Fig. 1, is substantially triangular in cross section. The slab 17 is preferably supported as shown in Fig. 2 upon the side walls 18 of the draw pot. The slab is preferably provided with a bore 19 throu h which a temperature control medium may e circulated as by means of the pipe 26. V I

To produce a sheet of glass 20, a double bait 21, comprising the chain portions carrying the ends 22 and 23, respectively, is moved into operative position. The member 22 is submerged in the glass onone side of the slab, while the member 23 is submerged in the glass on the other side. The bait is then moved upwardly in a manner that streams or films 0 glass will be moved up over the sides of so the slab-as indicated in F1 3. The streams are united at the upper an of the slab forming a single sheet of substantially uniform and predetermined thickness. The bait and sheet are preferably trained about a deflecting member such as a bendin member or roll 24, and then over a draw tab e25. After the sheet is started, the glass may be cracked off from the bait and the sheet then be continu-' ously produced, thus the bait being used to start t e draw only. v

The bottom of the slab, as shown in the drawings, is preferably arranged in spaced relation to the surface of the molten glass from which the sheet is drawn. The slab is preferably formed from a bi hly polished non-corrosive alloy, such as nic rome, monel, etc. although it may be formed from a suit able refractory clay or the like. By properly controlling the temperature of the slab, two 100 films or streams-27 and 28 maybe dragged I over the surfaces of said slab, which are of uniform thickness and temperature. When thesetwo' uniform streams are united at the top of the slab a sheet is produced which is flat andsubstantially free from all surface irregularities and defects. It will be seen that cases the lower edge of the slabs are arran ed in spaced relation with respect to the sur ace of the molten glass and that two streams are dragged or pulled overthe slabs, after which the two streams are united to form a single sheet. v

The'bottom of the slab is arranged in spaced relation to the surface of the glass thereunder,

but preferably close enough to absorb heat therefrom. This heat absorption is in addi-.

tion to the absorption from the glass between the lip tile coolers, thus permitting a more rapid formation of sheet than heretofore because the glass is conditioned more rapidly.

--Of course the cooling medium is circulated throughoutthe entire len th of the slab and ma be controlled in any esired manner.

Itis to be understood that the form of the invention herewith shown and described is to be taken as the preferred embodiment of-the same and that various changes in the shape,

size and arrangement of parts ma be resorted to without departing from t e spirit of the invention or the scope of the subjomed claims.

Claims: 1

1; In sheet glass apparatus, a receptacle containing a mass of molten lass, stationary means arranged above the ass, and means for drawing a'plurality of films of glass over said stationary means and in contact therewith.

2. In sheet 'glassfapparatus, a receptacle containing a mass of molten glass, stationary means arranged above the glass, and means for drawing a pluarlity of films of glass over said stationarymeans and in contact therewith in a manner that the films of glass unite to form a single sheet.

3. In sheet glass apparatus, a receptacle containing a mass of molten glass,.a slab arranged above said mass, and means for drawing a plurality of films of glass over said slab and in contact therewith. I

4. In sheet glass apparatus, a receptacle containing a massof molten a slab arranged over the said mass and-in spaced relation thereto, and means for drawing a ,of the slab.

plurality of streams of glass over said slab and in contact therewith.

5. In sheet glass a paratus, a receptacle containing a mass 0 molten glass, a slab arranged over the said mass and in spaced ing a mass of molten glass, a slab arranged .over the glass and supported by the pot, and

means for drawin a plurality of streams of glass over the sla said streams uniting at the top of the slab to form a single sheet.

8. In sheet glass apparatus, a receptacle containing a mass of molten glass, a slab arranged over the glass and in spaced relation thereto, means for controlling the temperature of the slab, and means'for drawing a plurality of streams of glass thereover simultaneously, said streams contacting with the slab and uniting at the top thereof to form a single sheet.

9. In sheet glass apparatus, a rece tacle containing a mass of molten glass, a su stan- 4 tially' triangular shaped slab arranged over the glass, and means for drawing streams of glass over two faces thereof and in contact therewith, said streams uniting to form a single sheet. I

10. In sheet glass apparatus, a receptacle containing a mass of molten glass, a substantially triangularshaped slab-arranged above the glass and in spaced relation thereto, and a double bait for drawing a3 stream of glass up both sides of said slab simultaneously.

' 11. In sheet glass apparatus, a rece tacle containing a mass of molten glass, a su stantially triangular shaped slab arranged above the glass and in spaced relation thereto, and

a double baitfor drawing a stream of glassv up both sides of said slab simultaneously said streams unitin at the top of said slab to formasingle eet. p

12. In sheet glass apparatus, a rece tacle containing a mass of molten g1 a an ntiallytriangular shaped slab arran d above the lass and in spaced relation t ereto, a

doub e bait for drawin a stream of glass I up both sides of said ab simultaneously, and means for controlling the temperature 13. In'sheet glass .ap aratus, a rece tacle containing a mass of mo ten glass, a su stantially triangular shaped slab arranged above the and in spaced relation thereto, a r

.a bait for drawing a'stream of glass up doub two streams of glass thereover simultaneously and in contact therewith, said streams uniting at the top of the slab to form a single sheet, and means for preventing narrowing of the sheet.

15. In sheet glass apparatus, a bait comprising two similar sections freely movable relative to one another, each section being provided for submersion in a mass of molten glass, said sections drawing two streams of glass from a molten mass simultaneously.

16. The process of producing sheet glass consisting in drawinga plurality of streams of glass upwardly from t e surface of a bath of molten lass, passin the streams after leaving said guiding member and in contact therewith, g and then uniting said streams to form a single s eet.

17. The method of forming sheet glass which comprises creatin two streams of molten glass, unitin sai streams, cooling so the space lietween t e streams ad acent to their line 0 'uncture and drawing the sheet formed by t e union of said streams upwardl 18. consisting in drawing a lurality of streams of glass upwardly from t e surface of a bath of molten lass passin the streams after leaving sai bath over t e sides of a single guiding member and in contact therewith, then uniting said streams to form a single sheet, and in cooling the space between the streams adjacent to their line of juncture.

19. The method of forming sheet glass which comprises creatin two streams .o molten glass, assin sai streams over the sides of a sin e gui g member and in contact therewit uniting said streams upon leaving said member, cooling. the space hejuncture and drawing the sheet formed by the union of said streams upwardly. 20. In sheet glass apparatus, a bait comprising two similar sections provided for subbath over t e sides of a single a he process of producing sheet glassof molten glass upwardly from a molten bath, passing sald upwardly moving streams over stationary converging directing surfaces, uniting said streams as they leave said surfaces to form a single sheet, and in then continuing upward movement of said sheet.

22. The method of forming sheet glass, which consists in feeding a pair of streams of molten lass upwardly from a molten bath, passing said upwardly moving streams over stationary converging directing'surfaces to a point above the level of said molten bath, uniting said streams as they leave said surfaces to form a single sheet, and in then continuing upward movementof said sheet.

Signed at Lancaster, in the county .of Fairfield, and State of Ohio, this 18th day of June,

LEOPOLD MIAMBOURG.

tween the streams adjacent to their line of Y each other during drawing of the two streams of lass upwardly from the molten mass where y to efiect a unitin f i streams.

21. The method, of forming sheet glass,

which consists in feeding a pair of streams 

